Question

我正在使用一种方法为我的按钮添加阴影。问题是在那之后，我无法点击它们。我将userinteractionenabled属性添加到YES，但仍然无法点按。

这是代码。

我该如何解决？我错过了什么吗？

- (UIView*)putView:(UIView*)view insideShadowWithColor:(UIColor*)color andRadius:(CGFloat)shadowRadius andOffset:(CGSize)shadowOffset andOpacity:(CGFloat)shadowOpacity
{
    CGRect shadowFrame; // Modify this if needed
    shadowFrame.size.width = 0.f;
    shadowFrame.size.height = 0.f;
    shadowFrame.origin.x = 0.f;
    shadowFrame.origin.y = 0.f;
    UIView * shadow = [[UIView alloc] initWithFrame:shadowFrame];
    shadow.userInteractionEnabled = YES; // Modify this if needed
    shadow.layer.shadowColor = color.CGColor;
    shadow.layer.shadowOffset = shadowOffset;
    shadow.layer.shadowRadius = shadowRadius;
    shadow.layer.masksToBounds = NO;
    shadow.clipsToBounds = NO;
    shadow.layer.shadowOpacity = shadowOpacity;
    [view.superview insertSubview:shadow belowSubview:view];
    [shadow addSubview:view];
    return shadow;
}

Answer 1

我找到了解决方案

在人民的评论之后，我做了一些改变。这是最终的代码

+ (void)putView:(UIView*)view insideShadowWithColor:(UIColor*)color andBlur:(CGFloat)shadowRadius andOffset:(CGSize)shadowOffset andOpacity:(CGFloat)shadowOpacity
{
    CGRect shadowFrame = view.frame;
    UIView * shadow = [[UIView alloc] initWithFrame:shadowFrame];
    shadow.backgroundColor = [UIColor redColor];
    shadow.userInteractionEnabled = YES; // Modify this if needed
    shadow.layer.shadowColor = color.CGColor;
    shadow.layer.shadowOffset = shadowOffset;
    shadow.layer.shadowRadius = shadowRadius;
    shadow.layer.cornerRadius = view.layer.cornerRadius;
    shadow.layer.masksToBounds = NO;
    shadow.clipsToBounds = NO;
    shadow.layer.shadowOpacity = shadowOpacity;
    [view.superview insertSubview:shadow belowSubview:view];
}

有了这个，您可以同时拥有圆角和阴影的视图。当然，启用了触摸事件！

Answer 2

这是有道理的，因为您在按钮上放置了UIView，这意味着您无法访问该按钮。您已在UserInteractionEnabled上设置UIView，但这没用，因为您没有要求UIView响应触摸事件。在这种情况下，我建议在UIView中添加UIGestureRecognizer，而不是尝试将UIView放在按钮上。

Answer 3

CGRect shadowFrame; // Modify this if needed
shadowFrame.size.width = 0.f;
shadowFrame.size.height = 0.f;
shadowFrame.origin.x = 0.f;
shadowFrame.origin.y = 0.f;
UIView * shadow = [[UIView alloc] initWithFrame:shadowFrame];

在上面的代码中，您有一个框架0,0,0,0的视图。那么你怎么能点击它？

添加子视图后无法单击UIButton

3 个答案: